Clean Water Act discharge permit · NPDES ILR10ZGXD

THOMAS PARK, Sterling, IL: NPDES ILR10ZGXD discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

THOMAS PARK, held by Sterling Park District, holds NPDES permit ILR10ZGXD. EPA’s file records it issued May 7, 2026 and expiring August 31, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for THOMAS PARK: its NPDES ID, its permit type and status, its dates, its address in Sterling, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILR10ZGXD.

Identity

Facility as filed	THOMAS PARK
Permittee as filed	Sterling Park District
NPDES ID	ILR10ZGXD
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	May 7, 2026
Expiration date	August 31, 2028
Issuing agency	IEPA
Address	Sterling, IL 61081
Subwatershed	Skunk Creek-Elkhorn River (HUC 070900050709)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES ILR10ZGXD.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES ILR10ZGXD.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID ILR10ZGXD there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

The Thomas Park storm water construction coverage held by the Sterling Park District is one of 15 such permits in Sterling, and the 0.0% of those 15 with a violation on file places it among the peers with no recorded violations. Of all 15 storm water construction permits in Sterling, this one included, 73.3% carry an earlier issue date than this permit, which was issued May 7, 2026. The permit also falls within a subwatershed that contains 12 NPDES permits, this one included.